CN105862549B - Band and its construction method are detained in biological cleaning for sponge urban municipal road - Google Patents
Band and its construction method are detained in biological cleaning for sponge urban municipal road Download PDFInfo
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- CN105862549B CN105862549B CN201610237192.7A CN201610237192A CN105862549B CN 105862549 B CN105862549 B CN 105862549B CN 201610237192 A CN201610237192 A CN 201610237192A CN 105862549 B CN105862549 B CN 105862549B
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
- E03F1/002—Methods, systems, or installations for draining-off sewage or storm water with disposal into the ground, e.g. via dry wells
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/0401—Gullies for use in roads or pavements
- E03F5/0404—Gullies for use in roads or pavements with a permanent or temporary filtering device; Filtering devices specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
Abstract
The invention discloses a kind of biological cleaning for sponge urban municipal road to be detained band and its construction method.The waterproof geotextiles that band includes being successively set on from bottom to up in sponge urban municipal road dividing strip are detained in the biological cleaning, rubble water purification layer, permeable geotextiles, conditioned soil water purification layer, erosion control brush layer, it is arranged on the overflow well in dividing strip center, the collector pipe in the rubble water purification layer is disposed longitudinally on along sponge urban municipal road, the transverse connecting pipe connected with the overflow bottom, overflow well runs through waterproof geotextiles, rubble water purification layer, permeable geotextiles, conditioned soil water purification layer and erosion control brush layer, and connected with collector pipe, the transverse connecting pipe is laterally set along sponge urban municipal road.Band is detained in the biological cleaning of the present invention has draining, infiltration, backwater, water storage, the function of water purification, available for town road and the arterial highway of surrounding city, town road is become sponge urban municipal road, promotes the development in sponge city.
Description
Technical field
The present invention relates to a kind of town road biological cleaning to be detained band and its construction method, can apply sponge Municipal road
Road is built, and belongs to field of road.
Background technology
Sponge city is a kind of urban construction new concept that country proposes.National house and town and country construction portion are required to 2020
Year, the area of completed region of the city more than 20% reaches target call, and the area to the year two thousand thirty more than 80% reaches target call.By
This can be seen that country improve resident living environment and Urban Water Environment there is an urgent need to sponge city requirement city is being rained
When with ooze, it is stagnant, store, net, use, the function of row.Road pavement is about 30% in the proportion that whole city is mated formation, and there is rainwater
The problem of road surface causes runoff pollution, water resource waste is washed away, therefore, gives full play to effect of the town road in sponge city
It is extremely important.In general town road mainly by car lane, bicycle lane, pavement, in point band, side divide band to form.By
In the continuous improvement to town road landscape effect and green percentage, in point band and side divide the width of band constantly increasing,
In the case of ensureing road safety use, band is divided to seem with effect of the side point with infiltration, water storage, water purification, backwater, draining in performance
It is very necessary.In current design of municipal road, all dividing strips are highly above road table, can not play above-mentioned work at all
With, and road surface can be polluted from the rainwater of dividing strip outflow, it will also aggravate the pressure of drainage system.
In order to which town road to be changed into the part in sponge city, improve city water resource environment, it is proposed that one kind is used for
Band is detained in the biological cleaning of sponge urban municipal road.Sponge the idea of the city proposed that 2014 in Nanning City in 2013 first
And Shenzhen has carried out desk study, desk study practice is just started in each experimental city at present.Sponge city is a system
Engineering, it is the integrated planning design in a region.Such as Nanning City, the bright new district in Shenzhen, it is that the planning in one big region is set
Meter, but they do not do specific design to accounting for city area of mating formation close to 30% road.With sponge urban municipal road phase
Corresponding is low influence road, in low influence highway layout at home and abroad, it is proposed that using drainage pavement, opening kerbstone, under
The requirement of female greenbelt, realizes the function of road drainage, is but not carried out the function of infiltration, water storage, water purification, backwater.Hair
Bright patent《A kind of ecology filter ditch and its design method》A kind of ecology filter ditch is disclosed, by the work of the filtering of planting soil and gravel
With reduction urban road runoff pollution, it is evident that the reduction of planting soil and gravel is limited in one's ability, can only filter the pollution of big particle diameter
Thing.Jiangsu Province sponge city experimental city Zhengjiang City, it is the model city of national sponge urban construction, Zhenjiang is in sponge city city
In political affairs road construction, porous asphalt pavement, opening kerbstone, up concave type greenbelt, overflow well are employed, following several respects be present
Problem：(1) table rainfall runoff in road is directly entered drainage pipeline networks, cannot purify and store；(2) water resource waste, can not obtain
Using.(3) overflow well is identical with earth's surface absolute altitude, and rainwater is directly entered overflow well after entering greenbelt, both easily causes overflow well
Block, while greenbelt can not play a part of backwater, water storage, infiltration.
The content of the invention
Technical problem：The present invention provides a kind of is used for sponge city with infiltration, water storage, water purification, backwater, drain function
Band is detained in the biological cleaning of town road, while provides the construction method that band is detained in a kind of biological cleaning.
Technical scheme：The present invention be used for sponge urban municipal road biological cleaning delay band, including from bottom to up according to
The secondary waterproof geotextiles being arranged in sponge urban municipal road dividing strip, rubble water purification layer, permeable geotextiles, conditioned soil water purification
Layer, erosion control brush layer, it is arranged on the central overflow well of dividing strip, is disposed longitudinally on the rubble water purification along sponge urban municipal road
Collector pipe, the transverse connecting pipe that connect with the overflow bottom in layer, waterproof geotextiles are detained with excavation along biological cleaning
The whole border laying of foundation ditch, the overflow well is through waterproof geotextiles, rubble water purification layer, permeable geotextiles, conditioned soil water purification
Layer and erosion control brush layer, and connected with collector pipe, the transverse connecting pipe is laterally set along sponge urban municipal road.
Further, biological cleaning of the present invention is detained in band, the erosion control brush layer by 2~5cm 10~20mm rubble groups
Into the conditioned soil water purification layer, rubble water purification layer and permeable geotextiles composition rainwater purification layer.
Further, biological cleaning of the present invention is detained in band, the conditioned soil water purification layer by fertile soil, charcoal, fine sand,
Planting soil is according to mass ratio 5: (3~7): (15~25): (65~73) mix, thickness are 0.8~1.2m；Described rubble
Water purification layer is made up of 20~30cm of thickness 10~20mm grade Stone；The overhead height of described overflow well is less than road surface
7~10cm of designed elevation, by the rain perforaled strainer with filtering function and draining well construction.
Further, biological cleaning of the present invention is detained in band, and described charcoal particle diameter is 30~60 mesh, and phosphorus content is more than
95%, described fertile soil is to be containing soil of the residual leaf of timbered deadwood through long-time putrid fermentation, described fine sand particle diameter
0.8~2mm, described planting soil are the normal soil for being adapted to plant growth.
Further, biological cleaning of the present invention is detained in band, and the collector pipe is the flexible porous of a diameter of 8~10cm
Manage, described permeable geotextiles are to be oozed with filtering and chemosmotic geotextiles, described waterproof geotextiles for prevention rainwater
Saturating geotextiles.
The method of band, including following step are detained in the above-mentioned biological cleaning for sponge urban municipal road of construction of the present invention
Suddenly：
1) divide the width of band according in design of municipal road points of band and side, it is determined that biology is detained the width of band, and carry out
The excavation of band is detained in biological cleaning；
2) build overflow well by laying bricks or stones, and set transverse connecting pipe to be connected with the gully on bicycle lane in its underpart；
3) along interface laying waterproof geotextiles are excavated, at least overlapping 15cm of seam crossing of two waterproof geotextiles, suture must
It must be carried out continuously, suture needle is apart from edge at least 3cm；
4) it is detained band longitudinal direction along biology and lays collector pipe；
5) construct successively from bottom to up rubble water purification layer, permeable geotextiles, conditioned soil water purification layer, obtain water purification layer；
6) pave 10~20mm rubbles of the particle diameters such as uniform thickness in conditioned soil water purification layer concave surface, and thickness is 2~
5cm, erosion control brush layer is obtained, concave surface bottom is away from 12~18cm of grade elevation.
Further, in the inventive method, in the step 1), biology is detained with by the way of artificial bench excavation,
Every grade of shoulder height is 40~60cm, and width is 40~60cm, and cutting depth is 1.25~1.65m.
Further, in the inventive method, in the step 2), the overhead height of overflow well is less than Pavement Design absolute altitude 7
~10cm, and rain perforaled strainer is installed.
Further, in the inventive method, the idiographic flow of the step 5) is：
1. 10~20mm rubbles of the particle diameters such as 20~30cm are inserted into biology is detained band, and using manually shakeouing, obtains broken
Stone water purification layer；
2. being spread using artificial rolling, permeable geotextiles, at least overlapping 15cm of seam crossing, suture are laid at the top of rubble water purification layer
It must be carried out continuously, suture needle is apart from edge at least 3cm；
3. according to parts by weight：5 parts of fertile soil, 3~7 parts of charcoal, 15~25 parts of fine sand, 65~73 parts of planting soil, one
Rise and add compulsory mixer or Double-horizontal-shaft trough and paddle mixer, taken out after mixing and stirring, be purified conditioned soil；
4. purification conditioned soil is backfilled into biology is detained band, coefficient of loose laying is 1.1~1.2 so that compactness reaches 65%
~75%, the thickness after compacting is 0.8~1.2m, and top layer is trimmed to up concave type, concave surface distance from bottom grade elevation 17~
20cm, obtain conditioned soil water purification layer.
Present invention purification is detained band by erosion control brush layer, water purification layer, collector pipe, overflow well, transverse connecting pipe, permeable geotechnique
Cloth, waterproof geotextiles composition, collector pipe is a diameter of 8~10cm flexible porous tube, and the overflow well is that internal diameter is 60cm's
Gully, bottom set transverse connecting pipe, described permeable geotextiles be with filtering and chemosmotic geotextiles, it is described
Waterproof geotextiles are to prevent the geotextiles of rain penetration.Overflow well is by the rain perforaled strainer with filtering function and draining well construction.
Heretofore described town road can be the town road for dividing band containing side, provincial highway, the national highway of band be divided containing side, band is divided in side
Width is not preferably less than 2.5m.
Containing charcoal, fertile soil, fine sand in conditioned soil water purification layer of the present invention, it is detained in biology in band first using biology
Charcoal improved soil technology, the heavy metal contaminants in rainwater can not only be cut down well, and be advantageous to the growth of plant, carry
The survival rate of high plant, and improve the penetrating power that band is detained in biological cleaning.Band knot is detained in corresponding new biological cleaning
Structure can be used for sponge urban municipal road drainage system, and integrate draining, infiltration, water storage, backwater, water purification function are in one.
Band is detained in the biological cleaning of the present invention makes town road be provided with draining, infiltration, backwater, water storage, the function of water purification,
Do not influence the safe handling of road simultaneously, common town road is become sponge urban municipal road.As sponge Municipal
Road, draining that need to be to sponge urban municipal road, infiltration, backwater, water storage, the ability of water purification are evaluated.Using heavy rain flood
Water management model, infiltration coefficient experiment, the observation of field test road, the experiment of pollutant fluxes merit rating, to sponge Municipal
The draining of road, infiltration, backwater, water storage, water purification ability are evaluated, by with common town road comparative analysis result table
It is bright, sponge urban municipal road of the invention have very effective drainability, infiltration ability, backwater ability, water-holding capacity,
Water purification ability, town road is set to be changed into the part in sponge city, available for newly-built or reconstruction town road construction.
Beneficial effect：The present invention compared with prior art, has advantages below：
Sponge city is in starting stage, the built sponge urban road in the country and other countries' phase in the world in China
The low influence road closed, draining and the water storage function of road are only considered emphatically, especially ignore the water purification function of road itself.This
Invent has with the essential difference of existing sponge urban road：
(1) backwater and infiltration ability are improved.Biological cleaning is detained with interior setting overflow well, current existing overflow well absolute altitude
Identical with earth's surface, rainwater is directly entered overflow well after entering greenbelt.Overflow well top surface absolute altitude of the present invention is higher than native table 8cm, rain
Water enters biological cleaning and is detained in band, first permeates so that band is detained in biological cleaning can permeate, store more rainwater, as far as possible
Performance biology be detained band effect.Only rainfall intensity is very big, i.e., biological cleaning be detained band inner product water depth reach 5~
After 8cm, just by overflow well draining, it is therefore prevented that rainwater is excessive to flood biological cleaning delay band；
(2) purifying rainwater, rain water pollutant is cut down.Due to caused greasy dirt during pavement usage and other heavy metals
Pollution, pollution runoff is formed after rain drop erosion, if being directly discharged into Storm Sewer Network, will undoubtedly cause water resource pollution.At present
It is planting soil and rubble that some biologies, which are detained with what is used, and planting soil and rubble have certain detergent power, but cut down pollution
Thing it is limited in one's ability.The present invention employs conditioned soil purifying layer first, is made up of charcoal, fertile soil, fine sand, planting soil, raw
Thing charcoal has loose structure, larger specific surface area and very strong adsorption capacity, the weight in very effective can drinking up the rain
Metal and organic pollution.Containing humus in fertile soil, humus heavy metal pollutant also has good adsorption capacity, from
And the pollutant in purifying rainwater, protect water body.Rainwater after improved native water purification layer purification, may take away in improvement soil layer
Soil particle, if being directly entered collector pipe easily causes blocking.Therefore, one layer of permeable geotextiles are provided with improvement soil layer bottom,
And 25cm metalling, further purifying rainwater are set under geotextiles.
(3) conditioned soil purifying layer is designed with beneficial to plant growth, improves the survival rate of plant.Added in conditioned soil purifying layer
Charcoal, fertile soil, fine sand, planting soil, the characteristics of loose structure of charcoal, specific surface area are big and adsorption capacity is strong, energy
Enough increase the effect of soil fertility, preservation of fertility.Fertile soil is the soil for being especially suitable for plant growth in itself, contains plant
The various nutritional ingredients of growth.The addition of fine sand can effectively strengthen the root respiration of plant, so as to be advantageous to plant life
It is long, improve the survival rate of plant；
(4) penetrating power that band is detained in biological cleaning is improved.Fine sand is added in conditioned soil purifying layer of the present invention, fine sand can
To improve the infiltration coefficient of soil, accelerate rainwater infiltration speed so that biological cleaning is detained band and stores and purify more rainwater；
(5) rainwater after collection and purification.After flexible porous tube collects improved native water purification layer and rubble water purification layer purification
Rainwater, water-storing device can be set at a certain distance from, the rainwater being collected into is used to clean road surface or pours plant, has saved water money
Source；
(6) urban waterlogging is alleviated.Common town road uses the drainage pattern of catch-basin, and drainage pattern is single,
And catch-basin is very easy to block, and causes discharge pressure big, it result in numerous cities and produce waterlogging.The biological cleaning of the present invention is stagnant
It is up concave type dividing strip to stay band, and kerbstone is arranged into the kerbstone that is open, then the rainwater on road surface can be directly entered biological cleaning delay
Band, it is detained through biological cleaning with a series of draining, infiltration, water storage, backwater and water purification function, not only alleviates urban waterlogging,
And realize the function in sponge city；
Brief description of the drawings
Fig. 1 is the structural representation that band is detained in biological cleaning of the present invention.
In figure：1- overflow wells, 2- collector pipes, 3- rubble water purification layers, 4- waterproof geotextiles, 5- conditioned soil water purification layers, 6- are saturating
Bandwidth is detained in water geotextiles, 7- erosion control brush layers, 8- transverse connecting pipes, b- biological cleanings, and band depth, d- are detained in H- biological cleanings
Overflow well diameter.
Embodiment
For a better understanding of the present invention, with reference to embodiment and Figure of description in the present invention is furture elucidated
Hold, but present disclosure is not limited solely to the following examples.
Embodiment 1：
As shown in drawings, biological cleaning is detained band by erosion control brush layer 7, conditioned soil water purification layer 5, waterproof geotextiles 4, permeable soil
Work cloth 6, rubble water purification layer 3, collector pipe 2, overflow well 1, transverse connecting pipe 8 form, the construction method of band is detained in biological cleaning,
Comprise the following steps：
Step 1, the excavation of band is detained in biological cleaning
Divide the width of band according in design of municipal road points of band and side, the excavation width b that band is detained in biological cleaning is equal to
Bandwidth is divided in side.As shown in drawings, biological cleaning is detained with by the way of artificial bench excavation, and every grade of shoulder height is
50cm, width 50cm, cutting depth H are 1.45m.
Step 2, overflow well is built by laying bricks or stones
The building method of overflow well 1 is identical with the gully on road, spacing 40m, and internal diameter d is 60cm, and bottom is set
Transverse connecting pipe 8 is connected with the gully on bicycle lane.The overhead height of overflow well 1 is less than Pavement Design absolute altitude 8cm, and
Rain perforaled strainer is installed.
Step 3, waterproof geotextiles are laid
Along interface laying waterproof geotextiles 4 are excavated, spread using artificial rolling, at least overlapping 15cm of seam crossing, suture must connect
Continuous to carry out, suture needle is apart from edge at least 3cm.
Step 4, flexible porous tube is laid
It is detained band longitudinal direction along biology and lays flexible porous tube 2, flexible porous tube caliber is 8cm.
Step 5, water purification layer is laid
1. 10~20mm rubbles of the particle diameters such as 25cm are inserted into biology is detained band, and using manually shakeouing, it is net to obtain rubble
Water layer 3.
2. laying permeable geotextiles 6 at the top of rubble water purification layer, spread using artificial rolling, at least overlapping 15cm of seam crossing, seam
Conjunction must be carried out continuously, and suture needle is apart from edge at least 3cm.
3. according to parts by weight：5 parts of fertile soil, 3 parts of charcoal, 22 parts of fine sand, 70 parts of planting soil, choose fertile soil, life
Thing charcoal, fine sand, planting soil, the particle diameter of charcoal is 30~60 mesh, and the particle diameter of fine sand is 0.8~2mm, by fertile soil, charcoal,
Fine sand, planting soil proportionally add compulsory mixer or Double-horizontal-shaft trough and paddle mixer together, are taken out after mixing and stirring 20 minutes,
It is purified conditioned soil.
4. purification conditioned soil is backfilled into biology is detained band, coefficient of loose laying 1.1, and uses small-sized compacting equipment so that
Compactness reaches 65%~75%, and the thickness after compacting is 1m, and top layer is manually trimmed to up concave type, concave surface distance from bottom road
Face absolute altitude 20cm, obtain conditioned soil water purification layer 5.
Step 6, erosion control brush layer is laid
Pave 10~20mm rubbles of the particle diameters such as uniform thickness in conditioned soil water purification layer concave surface, thickness 5cm, obtains
Erosion control brush layer 7, concave surface bottom is away from grade elevation 15cm.
Using storm flood administrative model, infiltration coefficient experiment, the observation of field test road, the examination of pollutant fluxes merit rating
Test, draining, infiltration, backwater to sponge urban municipal road, water storage, water purification ability are evaluated.Storm flood administrative model
Result of the test shows that, compared to common town road, the sponge urban municipal road earth's surface that band is detained using biological cleaning is integrated
Runoff coefficient reduces 54%, and road most unfavorable combination depth of accumulated water reduces 6.2cm, and total measurement (volume) of regulating and storing is 2400m3.Taken from scene
Not purified road table rainwater and biological cleaning are detained with the rainwater in interior flexible porous tube, analyze heavy metal Zn therein,
Pb, Cd, Cu content, it is detained through biological cleaning and reduces 40% with the pollutant load in the rainwater after purification.Sponge city
It is required that the reduction rate of pollutant is not less than 40%, illustrate that there is extraordinary row containing the town road that band is detained in biological cleaning
Water, infiltration, backwater, water storage and water purification function, accelerate the construction in sponge city.
Embodiment 2：
The difference for being differing principally in that conditioned soil purifying layer composition of embodiment, the difference of its proportion of composing will have influence on life
The detergent power and penetrating power of band are detained in thing purification.Remaining step is same as Example 1 or similar.
According to parts by weight：5 parts of fertile soil, 7 parts of charcoal, 15 parts of fine sand, 73 parts of planting soil, choose fertile soil, biology
Charcoal, fine sand, planting soil, the particle diameter of charcoal is 30~60 mesh, and the particle diameter of fine sand is 0.8~2mm, by fertile soil, charcoal, thin
Sand, planting soil proportionally add compulsory mixer or Double-horizontal-shaft trough and paddle mixer together, take out, obtain after mixing and stirring 20 minutes
To purification conditioned soil.Biological cleaning, which is obtained, according to the step of embodiment 1 is detained band, thickness 0.8m.
Using storm flood administrative model, infiltration coefficient experiment, the observation of field test road, the examination of pollutant fluxes merit rating
Test, draining, infiltration, backwater to sponge urban municipal road, water storage, water purification ability are evaluated.Storm flood administrative model
Result of the test shows that, compared to common town road, the sponge urban municipal road earth's surface that band is detained using biological cleaning is integrated
Runoff coefficient reduces 57%, and road most unfavorable combination depth of accumulated water reduces 6.6cm, and total measurement (volume) of regulating and storing is 1920m3.Taken from scene
Not purified road table rainwater and biological cleaning are detained with the rainwater in interior flexible porous tube, analyze heavy metal Zn therein,
Pb, Cd, Cu content, it is detained through biological cleaning and reduces 46% with the pollutant load in the rainwater after purification.
Embodiment 3：
According to parts by weight：5 parts of fertile soil, 5 parts of charcoal, 25 parts of fine sand, 65 parts of planting soil, choose fertile soil, biology
Charcoal, fine sand, planting soil, the particle diameter of charcoal is 30~60 mesh, and the particle diameter of fine sand is 0.8~2mm, by fertile soil, charcoal, thin
Sand, planting soil proportionally add compulsory mixer or Double-horizontal-shaft trough and paddle mixer together, take out, obtain after mixing and stirring 20 minutes
To purification conditioned soil.Biological cleaning, which is obtained, according to the step of embodiment 1 is detained band, thickness 1.2m.
Using storm flood administrative model, infiltration coefficient experiment, the observation of field test road, the examination of pollutant fluxes merit rating
Test, draining, infiltration, backwater to sponge urban municipal road, water storage, water purification ability are evaluated.Storm flood administrative model
Result of the test shows that, compared to common town road, the sponge urban municipal road earth's surface that band is detained using biological cleaning is integrated
Runoff coefficient reduces 59%, and road most unfavorable combination depth of accumulated water reduces 6.8cm, and total measurement (volume) of regulating and storing is 2880m3.Taken from scene
Not purified road table rainwater and biological cleaning are detained with the rainwater in interior flexible porous tube, analyze heavy metal Zn therein,
Pb, Cd, Cu content, it is detained through biological cleaning and reduces 45% with the pollutant load in the rainwater after purification.
Above-described embodiment is only preferred embodiment of the present invention according to entity project, for the common skill of the art
For art personnel, under the premise without departing from the principles of the invention, some improvement and equivalent substitution can also be made, these are to this hair
Bright claim be improved with the technical scheme after equivalent substitution, each fall within protection scope of the present invention.
Claims (7)
1. band is detained in a kind of biological cleaning for sponge urban municipal road, it is characterised in that the delay band include from it is lower to
On be successively set on waterproof geotextiles (4), rubble water purification layer (3), permeable geotextiles in sponge urban municipal road dividing strip
(6), conditioned soil water purification layer (5), erosion control brush layer (7), the overflow well (1) for being arranged on dividing strip center, along sponge Municipal road
Collector pipe (2) that road is disposed longitudinally in the rubble water purification floor (3), the lateral connection connected with the overflow well (1) bottom
Manage (8), the waterproof geotextiles (4) are detained the whole border with excavation pit along biological cleaning and laid, and the overflow well (1) is passed through
Wear waterproof geotextiles (4), rubble water purification layer (3), permeable geotextiles (6), conditioned soil water purification layer (5) and erosion control brush layer (7), and with
Collector pipe (2) connects, and the transverse connecting pipe (8) is laterally set along sponge urban municipal road, the conditioned soil water purification layer (5)
By fertile soil, charcoal, fine sand, planting soil according to mass ratio 5: (3~7): (15~25): (65~73) mix, thickness
For 0.8~1.2m；Described rubble water purification layer (3) is made up of 20~30cm of thickness 10~20mm grade Stone；It is described
The overhead height of overflow well (1) be less than Pavement Design 7~10cm of absolute altitude, by rain perforaled strainer and gully with filtering function
Composition.
2. band is detained in the biological cleaning according to claim 1 for sponge urban municipal road, it is characterised in that described
Erosion control brush layer (7) is made up of 2~5cm 10~20mm rubbles, the conditioned soil water purification layer (5), rubble water purification layer (3) with it is permeable
Geotextiles (6) form rainwater purification layer.
3. band is detained in the biological cleaning according to claim 1 for sponge urban municipal road, it is characterised in that described
Charcoal particle diameter be 30~60 mesh, the fertile soil that phosphorus content is more than described in 95% is through for a long time containing the residual leaf of timbered deadwood
The soil of putrid fermentation, described fine sand particle diameter are 0.8~2mm, and described planting soil is the normal soil for being adapted to plant growth.
4. band is detained in the biological cleaning for sponge urban municipal road according to claim 1,2 or 3, its feature exists
In the flexible porous tube that, the collector pipe (2) is a diameter of 8~10cm, described permeable geotextiles (6) are with filtering and ooze
The geotextiles acted on thoroughly, described waterproof geotextiles (4) are to prevent the geotextiles of rain penetration.
5. the construction method of band is detained in a kind of biological cleaning for sponge urban municipal road of claim 1,2,3 or 4,
Characterized in that, this method comprises the following steps：
1) divide the width of band according in design of municipal road points of band and side, it is determined that biology is detained the width of band, and carry out biology
The excavation of band is detained in purification；
2) build overflow well (1) by laying bricks or stones, and set transverse connecting pipe (8) to be connected with the gully on bicycle lane in its underpart；
3) along interface laying waterproof geotextiles (4) are excavated, at least overlapping 15cm of seam crossing of two waterproof geotextiles (4), suture
It must be carried out continuously, suture needle is apart from edge at least 3cm；
4) it is detained band longitudinal direction along biology and lays collector pipe (2)；
5) from bottom to up successively construct rubble water purification layer (3), permeable geotextiles (6), conditioned soil water purification layer (5), obtain water purification layer,
Idiographic flow is：
1. 10~20mm rubbles of the particle diameters such as 20~30cm are inserted into biology is detained band, and using manually shakeouing, it is net to obtain rubble
Water layer (3)；
2. being spread using artificial rolling, permeable geotextiles (6), at least overlapping 15cm of seam crossing, seam are laid at the top of rubble water purification layer (3)
Conjunction must be carried out continuously, and suture needle is apart from edge at least 3cm；
3. according to parts by weight：5 parts of fertile soil, 3~7 parts of charcoal, 15~25 parts of fine sand, 65~73 parts of planting soil, add together
Enter compulsory mixer or Double-horizontal-shaft trough and paddle mixer, taken out after mixing and stirring, be purified conditioned soil；
4. purification conditioned soil is backfilled into biology is detained band, coefficient of loose laying is 1.1~1.2 so that compactness reaches 65%~
75%, the thickness after compacting is 0.8~1.2m, and top layer is trimmed to up concave type, concave surface distance from bottom 17~20cm of grade elevation,
Obtain conditioned soil water purification layer (5)；
6) pave 10~20mm rubbles of the particle diameters such as uniform thickness in conditioned soil water purification layer (5) concave surface, and thickness is 2~5cm,
Erosion control brush layer (7) is obtained, concave surface bottom is away from 12~18cm of grade elevation.
6. the construction method of band, its feature are detained in the biological cleaning for sponge urban municipal road according to claim 5
It is, in the step 1), biology is detained with by the way of artificial bench excavation, and every grade of shoulder height is 40~60cm, wide
It is 1.25~1.65m to spend for 40~60cm, cutting depth.
7. the construction method of band, its feature are detained in the biological cleaning for sponge urban municipal road according to claim 5
It is, in the step 2), the overhead height of overflow well (1) is less than Pavement Design 7~10cm of absolute altitude, and installs rain perforaled strainer.
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